Perhaps you should try some spelling variations:
hanh trinh » canh tranh
hoang cong » hang cong, hoang long, hoang vuong
thien anh » thien danh, tien anh, thien thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
van hoang » van hoan, quan hoang, tran hoang
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cap » khan cap, thanh lap, thanh cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien anh) or (hieu manh)) - ((hanh trinh) OR (hanh chinh)) van hoang cong tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (hieu manh)) - ((hanh trinh) OR (hanh chinh)) van hoang cong tac than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien anh) or (hieu manh)) - ((hanh trinh) OR (hanh chinh)) van hoang cong tac than cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (hieu manh)) - ((hanh trinh) OR (hanh chinh)) van hoang cong tac than cap*.